Fix date parsing parsing words with weekdays in them (#607)

Co-authored-by: kolaente <k@knt.li>
Reviewed-on: https://kolaente.dev/vikunja/frontend/pulls/607
Co-authored-by: konrad <konrad@kola-entertainments.de>
Co-committed-by: konrad <konrad@kola-entertainments.de>

src/modules/parseTaskText.ts

@@ -0,0 +1,123 @@
+import {parseDate} from '../helpers/time/parseDate'
+import _priorities from '../models/priorities.json'
+
+const LABEL_PREFIX: string = '@'
+const LIST_PREFIX: string = '#'
+const PRIORITY_PREFIX: string = '!'
+const ASSIGNEE_PREFIX: string = '+'
+
+const priorities: Priorites = _priorities
+
+interface Priorites {
+	UNSET: number,
+	LOW: number,
+	MEDIUM: number,
+	HIGH: number,
+	URGENT: number,
+	DO_NOW: number,
+}
+
+interface ParsedTaskText {
+	text: string,
+	date: Date | null,
+	labels: string[],
+	list: string | null,
+	priority: number | null,
+	assignees: string[],
+}
+
+/**
+ * Parses task text for dates, assignees, labels, lists, priorities and returns an object with all found intents.
+ *
+ * @param text
+ */
+export const parseTaskText = (text: string): ParsedTaskText => {
+	const result: ParsedTaskText = {
+		text: text,
+		date: null,
+		labels: [],
+		list: null,
+		priority: null,
+		assignees: [],
+	}
+
+	result.labels = getItemsFromPrefix(text, LABEL_PREFIX)
+
+	const lists: string[] = getItemsFromPrefix(text, LIST_PREFIX)
+	result.list = lists.length > 0 ? lists[0] : null
+
+	result.priority = getPriority(text)
+
+	result.assignees = getItemsFromPrefix(text, ASSIGNEE_PREFIX)
+
+	const {newText, date} = parseDate(text)
+	result.text = newText
+	result.date = date
+
+	return cleanupResult(result)
+}
+
+const getItemsFromPrefix = (text: string, prefix: string): string[] => {
+	const items: string[] = []
+
+	const itemParts = text.split(prefix)
+	itemParts.forEach((p, index) => {
+		// First part contains the rest
+		if (index < 1) {
+			return
+		}
+
+		let labelText
+		if (p.charAt(0) === '\'') {
+			labelText = p.split('\'')[1]
+		} else if (p.charAt(0) === '"') {
+			labelText = p.split('"')[1]
+		} else {
+			// Only until the next space
+			labelText = p.split(' ')[0]
+		}
+		items.push(labelText)
+	})
+
+	return Array.from(new Set(items))
+}
+
+const getPriority = (text: string): number | null => {
+	const ps = getItemsFromPrefix(text, PRIORITY_PREFIX)
+	if (ps.length === 0) {
+		return null
+	}
+
+	for (const p of ps) {
+		for (const pi of Object.values(priorities)) {
+			if (pi === parseInt(p)) {
+				return parseInt(p)
+			}
+		}
+	}
+
+	return null
+}
+
+const cleanupItemText = (text: string, items: string[], prefix: string): string => {
+	items.forEach(l => {
+		text = text
+			.replace(`${prefix}'${l}' `, '')
+			.replace(`${prefix}'${l}'`, '')
+			.replace(`${prefix}"${l}" `, '')
+			.replace(`${prefix}"${l}"`, '')
+			.replace(`${prefix}${l} `, '')
+			.replace(`${prefix}${l}`, '')
+	})
+	return text
+}
+
+const cleanupResult = (result: ParsedTaskText): ParsedTaskText => {
+	result.text = cleanupItemText(result.text, result.labels, LABEL_PREFIX)
+	result.text = result.list !== null ? cleanupItemText(result.text, [result.list], LIST_PREFIX) : result.text
+	result.text = result.priority !== null ? cleanupItemText(result.text, [String(result.priority)], PRIORITY_PREFIX) : result.text
+	result.text = cleanupItemText(result.text, result.assignees, ASSIGNEE_PREFIX)
+	result.text = result.text.trim()
+
+	return result
+}